Iris-Pack-EarthWorld/dev.test/biomes/b.json

{
    "name": "Land",
    "layers": [
        {
            "minHeight": 3,
            "maxHeight": 6,
            "palette": [
                "STONE"
            ]
        },
        {
            "minHeight": 1,
            "maxHeight": 3,
            "palette": [
                "DIRT"
            ]
        }
    ],
    "generators":[
        {
            "generator": "plain",
            "min": 12,
            "max": 12
        }
    ],
    "derivative": "JUNGLE_EDGE"
}